113130121 has 20 divisors (see below), whose sum is σ = 130323492. Its totient is φ = 97863168.

The previous prime is 113130113. The next prime is 113130151. The reversal of 113130121 is 121031311.

It can be written as a sum of positive squares in 10 ways, for example, as 113124496 + 5625 = 10636^2 + 75^2 .

It is not a de Polignac number, because 113130121 - 2³ = 113130113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (113130151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 485421 + ... + 485653.

Almost surely, 2^113130121 is an apocalyptic number.

It is an amenable number.

113130121 is a deficient number, since it is larger than the sum of its proper divisors (17193371).

113130121 is an frugal number, since it uses more digits than its factorization.

113130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 113130121 is about 10636.2644288303. The cubic root of 113130121 is about 483.6443112748.

Adding to 113130121 its reverse (121031311), we get a palindrome (234161432).

The spelling of 113130121 in words is "one hundred thirteen million, one hundred thirty thousand, one hundred twenty-one".